So, my "service engine soon" light is on. The code says its oxygen sensor bank 1 sensor 1.

I purchased the correct OEM sensor and replaced it. However, the light turned back on shortly.

So, I figured maybe the sensor was defective and I had Infiniti warranty it. They gave me a new one.

I installed the new one and the light turned back on shortly after. I have no idea what to do. I cleared the codes after install and even unplugged the battery. Light is still on.

Any advice on how to go about this situation? Only other thing I can think of is some sort of master reset or something that only the dealer can do.

PS
Inspection is way passed due so I need to do something about this.

 

Awesome, thanks for the help G community.......

 

If you changed bank 1 sensor 1 then you should have pull the passanger side sensor before the Cat on the manifold. If this the one you changed then switch them see if you throw the code to the opposite side. If you throw same code then its not the sensor If the code switches then its the sensor. it could be anything including melted wire.

Also Check the PCV valve ... I replaced all sensors and still popped codes because of this littel 13.00 part...

 

Also exact code will help... there are over 29 OBDII codes related to O2 or air fuel sensors